1. 1
   Spinning tops; the "Operatives' lecture" of the British Association meeting at Leeds, 6th September 1890

   by Perry, John, 1850-1920
   Published 1910

   London, New York, Society for Promoting Christian Knowledge; E. S. Gorham, 1910.

   149 p. illus.

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2. 2
   The Steam engine and gas and oil engines : a book for the use of students who have time to make experiments and calculations

   by Perry, John, 1850-1920
   Published 1899

   London ; New York : MacMillan, 1899.

   viii, 646 p. : ill. ; 23 cm.

   Also issued online.

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